Chevrolet 3500HD 2024–2025 — technical service bulletin
Bulletin PIP6049A · NHTSA communication 11016154 · issued Mar 24, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2024–2025
model years
26
vehicle entries
Official summary
This Preliminary information communicates a diagnostic aid to install dye to the trans fluid to isolate the leak prior to attempting repair.
Vehicles covered
- 2024 Chevrolet 3500HD
- 2024 Chevrolet Colorado
- 2025 Chevrolet Colorado
- 2024 Chevrolet Express
- 2024 Chevrolet Express 2500
- 2024 Chevrolet Express 3500
- 2024 Chevrolet Express Cutaway Van
- 2024 Chevrolet Silverado 1500
- 2025 Chevrolet Silverado 1500
- 2024 Chevrolet Silverado 2500
- 2025 Chevrolet Silverado 2500
- 2024 Chevrolet Silverado 3500
- 2025 Chevrolet Silverado 3500
- 2024 GMC 3500HD
- 2024 GMC Canyon
- 2025 GMC Canyon
- 2024 GMC Savana
- 2025 GMC Savana
- 2025 GMC Savana 3500
- 2024 GMC Savana Cutaway Van
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
- 2024 GMC Sierra 2500
- 2025 GMC Sierra 2500
- 2024 GMC Sierra 3500
- 2025 GMC Sierra 3500
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.